WO2013110366A2 - Dispositif d'injection d'eau pour circuit de dérivation de vapeur d'une centrale électrique - Google Patents

Dispositif d'injection d'eau pour circuit de dérivation de vapeur d'une centrale électrique Download PDF

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Publication number
WO2013110366A2
WO2013110366A2 PCT/EP2012/071984 EP2012071984W WO2013110366A2 WO 2013110366 A2 WO2013110366 A2 WO 2013110366A2 EP 2012071984 W EP2012071984 W EP 2012071984W WO 2013110366 A2 WO2013110366 A2 WO 2013110366A2
Authority
WO
WIPO (PCT)
Prior art keywords
wall
steam
injection device
water injection
water
Prior art date
Application number
PCT/EP2012/071984
Other languages
German (de)
English (en)
Other versions
WO2013110366A3 (fr
Inventor
Frank Deister
Original Assignee
Siemens Aktiengesellschaft
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to JP2014552534A priority Critical patent/JP2015511168A/ja
Priority to US14/371,940 priority patent/US20140345723A1/en
Priority to EP12786928.7A priority patent/EP2776757B1/fr
Priority to CN201280068178.9A priority patent/CN104094053B/zh
Publication of WO2013110366A2 publication Critical patent/WO2013110366A2/fr
Publication of WO2013110366A3 publication Critical patent/WO2013110366A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/02—Branch units, e.g. made in one piece, welded, riveted
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G5/00—Controlling superheat temperature
    • F22G5/12—Controlling superheat temperature by attemperating the superheated steam, e.g. by injected water sprays
    • F22G5/123—Water injection apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F25/00—Flow mixers; Mixers for falling materials, e.g. solid particles
    • B01F25/30—Injector mixers
    • B01F25/31—Injector mixers in conduits or tubes through which the main component flows
    • B01F25/314—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit
    • B01F25/3142—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction
    • B01F25/31423—Injector mixers in conduits or tubes through which the main component flows wherein additional components are introduced at the circumference of the conduit the conduit having a plurality of openings in the axial direction or in the circumferential direction with a plurality of perforations in the circumferential direction only and covering the whole circumference
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87571—Multiple inlet with single outlet

Definitions

  • the invention relates to a water injection device for a UmleitdampfSystem a power plant, comprising a flow channel for steam with a steam inlet and a steam outlet, and arranged between the steam inlet and outlet injection nozzle.
  • Power plants for generating electrical energy usually use the thermal energy of a combustion process for generating mechanical energy, which is then converted into electrical energy in a generator. Often directly fired steam generators are used here, which generate steam for a steam turbine. The thermal energy for steam generation can also be obtained from other sources such as nuclear energy. Another without the detour via the steam generation offers, for example, a direct implementation in a gas turbine. In this case too, however, the hot exhaust gases of the gas turbine are often used in a waste heat boiler to generate steam. In summary, therefore, steam is used in most power plants for power generation.
  • the steam required to operate the steam turbine is generated in a steam boiler from previously purified and treated water. By further heating the steam in the superheater ⁇ the temperature and the specific volume of steam increases. From the boiler of the steam pipe over ⁇ lines flowing into the steam turbine where it is part of its previously recorded energy as kinetic energy to the turbine off. To the turbine, a generator is coupled, which converts the mechanical power into electrical power. ⁇ to as the expanded and cooled steam flows into the capacitor con ⁇ where he con- by heat transfer to the environment condenses and collects as liquid water at the lowest point of the capacitor. The condensate pumps and preheaters are used to temporarily store the water in a feed water tank and then feed it back into the boiler via the feed pump.
  • the water injection device typically comprises a plurality of injection nozzles arranged between its inlet and outlet. These are usually arranged on the peripheral wall of the steam channel of the water injection device.
  • nozzle inlet to a line extending substantially in the direction of gas flow and spaced apart from an inner wall of the flow channel arranged ⁇ wall is arranged.
  • the wall has a flat profile on its side facing the inner wall. Characterized the Dampfström between the inner wall and the wall is minimal and remains disabled respect ⁇ Lich its flow rate and temperature far ⁇ continuously unaffected. On the one hand, this maximizes the already explained shearing layer formation, on the other hand so the area on the inner wall remains particularly hot, so that in the direction of the inner wall transported water evaporates particularly well and not deposited unused on the inner wall.
  • the invention is based on the assumption that a particularly good cooling effect could be achieved by achieving a more homogeneous distribution of the water in the steam jet. Namely, a more homogeneous distribution leads to a more complete evaporation of the injected water and thus to a more uniform vapor temperature at the inlet of the condenser. It was recognized that the usual injection on the inner wall between the steam inlet and outlet is disadvantageous because the injected water at the edge does not penetrate into the core of the steam jet, even if the
  • Inner wall is narrowed at the injection point and is closer to the core of the steam stream.
  • the reason is the high Geschwin ⁇ speed of the steam. Therefore, the injection nozzle should be arranged on a wall spaced from the inner wall of the flow channel. This requires a position of the injection nozzle closer to the core of the vapor stream, since the division of the vapor stream, already a part of the vapor stream between Wan ⁇ tion and inner wall is passed and thus the nozzle itself is arranged despite the same amount of electricity closer to the core of the steam.
  • the injection nozzle is arranged on the side facing away from the inner wall side of the wall, ie towards the core of the flow. This will on the one hand avoided that a part of the water unvaporized deposited on the inner wall and thus does not contribute to cooling at ⁇ . On the other hand, the steam part-stream between the wall and the inner wall remains without injection and there is a tem perature ⁇ and flow velocity difference between the steam part-stream between the wall and inner wall and the
  • the injection nozzle of the wall is disposed at an inclined towards in the direction of the steam inlet to the inner wall portion, ie, in a range in which the available cross-section for the at the inner wall from ⁇ side facing the wall of the flowing steam part stream expanded tert.
  • the wall advantageously has a curved profile on its side facing away from the inner wall, so that together with the abovementioned arrangement of the injection nozzle, it is arranged in the flow direction behind the curvature.
  • the inner wall forms a cylindrical section.
  • Such a configuration of the water injection device can be constructed particularly simply and, due to the radial symmetry, permits a particularly homogeneous vapor flow.
  • the wall forms a concentric ⁇ to the inner wall's cylindrical portion, the wall thus forms a cylinder jacket and can, for. B. be secured with appropriate struts on the inner wall.
  • the struts should have a cross section in the flow direction, which hinders the steam flow as little as possible. In the struts and the supply of injection water can be arranged. With the above-mentioned embodiment, the vapor stream is thus divided into a central main flow and a peripheral bypass flow.
  • a UmleitdampfSystem for a power plant part adhesive comprises legally before ⁇ such a water injection device, and a power plant advantageously such order ⁇ leitdampfSystem.
  • the advantages achieved by the invention are, in particular, that a shear layer is produced by dividing the steam flow and injection of water ⁇ into only a partial flow, which significantly improves the mixing and atomization of the injected water by film atomization from both sides and thus a particularly gooddewir ⁇ effect is achieved in UmleitdampfSystems.
  • FIG. 1 shows a water injection device with arranged on the inner wall injection nozzles according to the prior art
  • FIG. 2 shows a water injection device with arranged on a wall spaced from the inner wall disposed injection nozzles.
  • the water injection device 1 comprises a flow channel 2, which is surrounded by a about an axis 4 radialsymmet ⁇ -located inner wall. 6
  • the steam inlet 8 is located on the left in FIG. 1, the steam outlet 10 on the right.
  • the cross section of the steam inlet 8 is smaller As a result, the bottom expandered jet resulting behind the convergent-divergent nozzle 14 does not contact the inner wall 6.
  • the water injection device 1 is part of a Umleitdampfsystems a power plant, which is not closer ⁇ is set. Not shown is a steam inlet 8 before ⁇ switched diverter valve, is passed with the steam flow from the steam ⁇ generator of the power plant on the steam turbine over by the bypass steam directly into the steam outlet 10 downstream capacitor.
  • injection nozzles 12 are arranged in the water injection device 1 at the outlet of a narrowing section 14, which inject water into the vapor stream.
  • this is not achieved in section 14 in spite of the high vapor velocity that what ⁇ ser reaches the axis 4 and thus the core of the vapor stream.
  • part of the water reaches the inner wall 6 undamped and deposits there.
  • the mixing of the water with steam and the atomization of the water are substantially improved.
  • the inner wall 6 after the steam inlet 8 initially forms a widening conical section 16, to which a cylindrical section 18 adjoins.
  • a substantially cylindrical jacket-shaped wall 20 is spaced from the inner wall 6 and symmetrically around the axis 4 disposed ⁇ .
  • the wall 20 has a to the inner wall 6 towards a flat Pro ⁇ fil on. It is curved towards the axis 4.
  • the injectors 12 are arranged radially symmetrically.
  • the wall 20 is fixed by means of struts 24 on the inner wall. The cross ⁇ cut and the profile of the struts 24 are so out ⁇ staltet that the steam flow to minimize interference.
  • the struts 24 and the water supply 26 is arranged.
  • the vapor stream is divided into a partial flow between the wall 20 and inner wall 6 and a partial flow in the interior of the wall 20.
  • Water is only injected into the internal partial flow, causing it to cool down.
  • Downstream of the wall of a shear layer is formed during the reunification of the two partial streams 28. This ensures a particularly good ⁇ mix of the two partial flows and thus a further atomization and mixing of the water with the steam.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nozzles (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

L'invention se rapporte à un dispositif d'injection d'eau (1) pour un circuit de dérivation de vapeur d'une centrale électrique, comprenant un canal d'écoulement (2) pour la vapeur comprenant une entrée de vapeur (8) et une sortie de vapeur (10), ainsi qu'une buse d'injection (12) agencée entre l'entrée et la sortie de vapeur (8, 10), et a pour but de fournir un dispositif d'injection qui produit un effet de refroidissement particulièrement efficace afin d'éviter les dommages causés au condenseur, avec des moyens particulièrement simples du point de vue technique. Ce but est atteint par l'installation de la buse d'injection (12) sur une paroi (20) espacée de la paroi interne (6) du canal d'écoulement (2), et s'étendant sensiblement dans la direction de l'écoulement du gaz.
PCT/EP2012/071984 2012-01-25 2012-11-07 Dispositif d'injection d'eau pour circuit de dérivation de vapeur d'une centrale électrique WO2013110366A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2014552534A JP2015511168A (ja) 2012-01-25 2012-11-07 発電所のバイパス蒸気システムのための水噴射装置
US14/371,940 US20140345723A1 (en) 2012-01-25 2012-11-07 Water injection device for a bypass steam system of a power plant
EP12786928.7A EP2776757B1 (fr) 2012-01-25 2012-11-07 Dispositif d'injection d'eau pour circuit de dérivation de vapeur d'une centrale électrique
CN201280068178.9A CN104094053B (zh) 2012-01-25 2012-11-07 用于发电厂的旁路蒸汽系统的喷水设备

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12152417.7 2012-01-25
EP20120152417 EP2620703A1 (fr) 2012-01-25 2012-01-25 Dispositif d'injection d'eau pour un système de dérivation de vapeur d'une centrale électrique

Publications (2)

Publication Number Publication Date
WO2013110366A2 true WO2013110366A2 (fr) 2013-08-01
WO2013110366A3 WO2013110366A3 (fr) 2013-12-19

Family

ID=47178652

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/071984 WO2013110366A2 (fr) 2012-01-25 2012-11-07 Dispositif d'injection d'eau pour circuit de dérivation de vapeur d'une centrale électrique

Country Status (5)

Country Link
US (1) US20140345723A1 (fr)
EP (2) EP2620703A1 (fr)
JP (1) JP2015511168A (fr)
CN (1) CN104094053B (fr)
WO (1) WO2013110366A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017125666A1 (de) * 2017-11-02 2019-05-02 Elwema Automotive Gmbh Vorrichtung und Verfahren zum Reinigen von Werkstücken mittels eines Dampfstrahls und Dampferzeuger hierfür
US10794225B2 (en) * 2018-03-16 2020-10-06 Uop Llc Turbine with supersonic separation

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DE2907694C2 (de) * 1979-02-27 1984-11-22 Mannesmann AG, 4000 Düsseldorf Mischvorrichtung für strömende flüssige, gas- oder dampfförmige Medien
JPS6016819Y2 (ja) * 1980-05-13 1985-05-24 バブコツク日立株式会社 水噴射式減温装置
JPS5747105A (en) * 1980-09-02 1982-03-17 Tokyo Shibaura Electric Co Cooling water nozzle
DE3320688A1 (de) * 1982-06-09 1984-01-12 ADL-Innovation K.B., 35240 Växjö Verfahren zur einleitung einer fliessenden substanz, beispielsweise eines schlammes, in zu reinigende gase, beispielsweise abgase, und zerstaeubungseinrichtung zur durchfuehrung des verfahrens
DE3713726A1 (de) * 1987-04-24 1988-11-03 Schneider Bochumer Maschf A Vorrichtung fuer die kuehlung von heissdampf
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Also Published As

Publication number Publication date
EP2620703A1 (fr) 2013-07-31
US20140345723A1 (en) 2014-11-27
JP2015511168A (ja) 2015-04-16
CN104094053A (zh) 2014-10-08
EP2776757A2 (fr) 2014-09-17
EP2776757B1 (fr) 2016-01-20
WO2013110366A3 (fr) 2013-12-19
CN104094053B (zh) 2016-06-01

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